4.3L V6 Offshore F350
Dark blue water. Miles from land. Nothing but you, your crew and the monsters raring to give you a run for your money. Year after year—your love of the offshore remains unchanged. Your tech on the other hand is always the most advanced—including your outboard. The all-new 4.3L V6 Offshore F350 merges all the best tech from our full line of outboards with some impressive tech of its own. The result is a perfectly balanced, deep breathing V6 that delivers jaw-dropping power and the best power-to-weight in its class—the new, 4.3L V6 Offshore F350.
Meet the Lineup
350 HP
Weighing in at 629 pounds and delivering an astounding 11:1 compression ratio, the new 4.3L V6 Offshore F350 creates jaw-dropping power in an incredibly light design. In fact, it boasts the best power-to-weight in its class—by more than 65 pounds. Available in Yamaha gray, pearlescent white or new classic white, the 4.3L V6 F350 is the new knockout offshore.
- Recommended fuel: 89 Octane
- Shaft lengths available: 25”, 30” and 35”
- Alternator output: up to 70 amp
350 HP
Engine Comparison
| Weight † | 250 kg (551 lbs) / 254 kg (562 lbs) / 265 kg (588 lbs) |
|---|---|
| Full Throttle RPM Range | 5000 ~ 6000 rpm |
| Fuel Induction System | EFI |
| Recommended Engine Oil | Yamalube® 4M (See owner's manual) |
| Engine Type | V6 |
| Displacement | 4.3L |
| Bore x Stroke | 96 x 98mm (3.78 x 3.86 in) |
| Prop Shaft Horsepower | 350 @ 6000 |
| Alternator Output at W.O.T. | 50 – 70 amp |
| Compression Ratio | 11.0:1 |
| Recommended Fuel | Octane 89 |
| Recommended Fuel Filtration | Yamaha 10-Micron Fuel / Water Separating Filter (external) |
| C.A.R.B. Rating | 3 Star |
| Exhaust | Through Propeller (Except in Reverse Under 2500 RPM) |
| Intake | 24 |
| Ignition | TCI Microcomputer |
| Spark Plug | ILMAR7E-9 / Iridium |
| Starting System | Electric w/ PTT |
| Lubrication | Wet Sump |
| Engine Oil Capacity | 7.9 L/ 7.6 L |
| Recommended Cooling | Thermostatic Control |
| Ethanol Blend Limit | 10% Maximum |
| Gear Ratio | 1.75:1 |
| Gear Shift | Forward, Neutral, Reverse |
| Shaft Length | 25" - 30" - 35" |
| Degree of Tilt | 69° |
| Degree of Trim | -3° through +16° |
| Mounting Centers | 28.5" |
| Steering | Integrated, Electric Actuation |
| Steering Angle (maximum) | 32° from center, either direction |
| Warranty | Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial |
† Weight refers to shortest shaft length, and is measured without motor oil, gearcase oil and propeller (except models 25 hp and under, which include a standard propeller). All Jet model weights include the jet pump assembly (weight estimated).
350 HP
Compatible Controls
Compatible Gauges
Prop Selector
Enter your details. Find the right prop. Easily zero-in on the best propeller options based on your type of craft, horsepower and performance goals with this smart, online tool.
visit yamaha prop selector
| Boat Model: Engine: Bulletin: |
Bennington 25QSBA F350XSA View |
|---|---|
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Regal LX6 F350XSA2 View |
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Tidewater 3100 Carolina Bay F350XSA2 / LF350XSA2 View |
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Freeman 37 VH LF350USA2 / F350USA2 / LF350USA2 / F350USA2 View |
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World Cat 325 CC LF350XSA2 / F350XSA2 View |
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Regal 38 SAV LF350XSA2 / F350ESA2 / F350XSA2 View |
| Boat Model: Engine: Bulletin: |
Bennington 27QXSBWAX2 LF350XSA2 / F350XSA2 View |
| Boat Model: Engine: Bulletin: |
Key West 291FS F350XSA2 / LF350XSA2 View |
| Boat Model: Engine: Bulletin: |
Sea Pro 322 Offshore F350XSA2 / LF350XSA2 View |
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Sea Fox 368 Commander LF350USA2 / F350ESA2 / F350USA2 View |
| Boat Model: Engine: Bulletin: |
Southport 33 DC LF350XSA2 / F350XSA2 View |
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Godfrey XP 2500W F350XSA View |
| Boat Model: Engine: Bulletin: |
Cobia 301 CC LF350XSA / F350XSA View |
| Boat Model: Engine: Bulletin: |
Cobia 320 CC LF350XSA2 / F350XSA2 View |
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WHITE
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GRAY
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CLASSIC
Gallery
LIGHTEST
IN ITS CLASS
The new, 4.3L V6 Offshore F350 offers the best power-to-weight in its class, coming in more than 65 pounds lighter than comparable outboards.
Features & Benefits
It’s center-mounted 81mm electronic throttle valve is eight percent larger than the F300. Flanked by identical port and starboard intake manifolds, it creates a well-balance design, smooth air flow and responsive power.
A camshaft profile with a higher valve lift allows for longer opening duration for intake and exhaust. Combined with reimagined valve lifters, it creates precise clearance for increased combustion.
A new clutch dog design, machined with more teeth, increases torque transfer from powerhead to propeller.
Our 4.3L V6 Offshore F350’s 70-amp alternator produces more than 30 net amps per outboard at idle—nearly double that of Yamaha’s other comparable outboards.
Iridium spark plugs work together with Yamaha’s new fuel injection control mapping to produce a lengthened injector duration for more power.
Helm Master® EX includes Autopilot with Heading/Course Hold, 10+ automated modes for fishing and relaxing, in-mode joystick adjustability and the expanded ability to control up to five outboards. There’s even an optional theft-deterrent system, Y-COP®, which disables the ignition and fuel systems while docked.
A Yamaha exclusive, TotalTilt® performs a quick, full trim up or down with the fast, double-tap of a button. This makes trailering quick and easy and is handy when a complete up or down tilt is needed.
Thrust Enhancing Reverse Exhaust keeps exhaust bubbles away from the propeller below 2500 RPM and when in reverse. This means the prop bites only clean water, which results in outstanding reverse thrust and control—especially when backing down on fish and when maneuvering around docks.
RELIABILITY & DURABILITY
